rednet.open("left")
r=peripheral.wrap("right")
function doShow()
 for i=1,64 do
  r.launch(4,1)
  sleep(math.random(0,1))
  r.launch(4,2)
  sleep(math.random(0,1))
  r.launch(4,3)
  sleep(math.random(0,1))
 end
end
id, message = rednet.receive()
if message == "doShow" then
 print("Starting show.")
 doShow()
end